Police interrupted six events in Christchurch and two in Rolleston on Thursday night where more than 100 cars were involved.
Officers impounded three vehicles for sustained loss of traction and issued 18 infringement notices to other drivers, Inspector Craig Scott said.
A further two cars were issued green stickers for compliance issues and another was deemed unsafe and given a pink sticker, meaning it cannot be driven.
“Canterbury police will have a much larger presence on the roads from tonight.”
He asked any member of the public who saw illegal activity to call 111.
Tip-offs from the public played a key part in helping police track boy racers’ movements.
“We’re asking the community for as much information as possible about these anti-social gatherings,” Scott said.
He said police wanted details of cars, licence plate numbers and what streets they were on. But he said people should not put themselves at risk to get such information.
“And please, do not take matters into your own hands.”
He said people should phone 111 if the incident was ongoing, call 105 after the fact, and call 0800 555 111 if they wanted to remain anonymous.
Meanwhile, in the North Island, police had deployed the Eagle helicopter to disrupt boy racers around the mid to lower regions of the island.
It comes after a large, violent boy racer event in Levin on June 1. Two police officers were injured after being pelted with rocks, bottles and bricks. More than 200 cars were gathered.
Assistant Commissioner Sandra Venables said the Eagle allowed police to respond quickly to any possible meet-ups and relay real-time information to staff on the ground.
“Our Eagle team’s ability to capture visual evidence will also be an important part of our investigation phase.
“Eagle is highly effective and one of our best tools available to target this type of behaviour. If you hear the helicopter overhead, please don’t be alarmed - we hope you will be reassured that we are taking action against illegal activity in your community,” Venables said.
“We ask the public to be patient with us as we work across the weekend.”